Intelligent liquid cooling charging system and method based on plate exchange isolation and phase change heat storage

Abstract

The application discloses an intelligent liquid cooling charging system and method based on plate heat exchanger insulation and phase change heat storage, and relates to the technical field of liquid cooling charging. The method comprises the following steps: S1, collecting liquid cooling full loop working condition data in real time, and performing data preprocessing; S2, judging the health state of the plate heat exchanger, adjusting the liquid cooling parameters, and guaranteeing the heat exchange efficiency and charging safety; S3, evaluating the heat storage capacity of the phase change material heat storage unit, and taking high-load charging safety and heat management stable maintenance measures; S4, dynamically evaluating the temperature control and energy consumption state, quantifying the comprehensive performance of each group of flow distribution, selecting a flow distribution scheme and adjusting the pump speed, and performing liquid cooling global collaborative optimization. The application solves the problem that, due to the large power liquid cooling charging system under high heat load working condition, the cooling circuit is difficult to timely export a large amount of heat, which easily leads to temperature rise of the power module and the charging gun line, energy consumption increase, element pollution and equipment failure, and further causes the safety hidden trouble in the charging process.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of liquid cooling charging, in particular to an intelligent liquid cooling charging system and method based on plate exchange isolation and phase change heat storage. BACKGROUND

[0002] With the rapid development of new energy vehicles and power storage technologies, high-power direct current fast charging systems are widely used in many scenarios such as transportation, logistics and public services, and higher requirements are put forward for charging efficiency, operation safety and equipment reliability. The traditional air cooling and natural cooling methods have been difficult to meet the demand for high-efficiency heat dissipation and thermal stability of the charging system in the environment of high current and high heat flux density. Liquid cooling technology, with its excellent heat conduction performance, excellent temperature control accuracy and flexible engineering adaptation ability, is becoming the core heat dissipation means of the new generation of high-power charging equipment.

[0003] For example, the patent with the announcement number CN113765188B discloses a power station, a charging system, a liquid cooling system and a control method and a control device thereof. The liquid cooling system comprises a liquid cooling unit; a first liquid guide assembly in communication with the liquid cooling unit and used for dissipating heat for the charging module; and at least one second liquid guide assembly, the number of the liquid guide assemblies corresponding to the number of the batteries, one end of each second liquid guide assembly being in communication with the liquid cooling unit, and a second end of each second liquid guide assembly being used for being in one-to-one communication with a liquid cooling device of a corresponding battery to dissipate heat for the corresponding battery; or the second liquid guide assembly, one end of the second liquid guide assembly being in communication with the liquid cooling unit, and a second end of the second liquid guide assembly being used for being in communication with the liquid cooling device to dissipate heat for each battery. The technical scheme of the application can solve the problem of low charging efficiency of the battery of the charging system by using one liquid cooling system to simultaneously perform liquid cooling heat dissipation for the charging module and the battery of the charging system.

[0004] For example, the patent with the announcement number CN115912535B discloses a power supply and distribution control system for a liquid cooling charging device. The system comprises: an energy consumption calculation module that obtains an average current value of a first current value and a second current value within a set time, obtains an input power and an output power of the liquid cooling charging device according to an input voltage and an output voltage of the liquid cooling charging device, and calculates an energy consumption value of the liquid cooling charging device; a data storage module that is responsible for storing the input power, the output power and the energy consumption value of the liquid cooling charging device; and a data analysis module that compares the energy consumption value obtained by the energy consumption calculation module with a preset threshold value, and if the energy consumption value exceeds the preset threshold value, an alarm is sent, and if the energy consumption value does not exceed the preset threshold value, no alarm is sent. The energy consumption value can accurately reflect the power supply and distribution efficiency of the liquid cooling charging device, can truly reflect the working state of the liquid cooling charging device, and can improve the intelligent level of the liquid cooling charging device.

[0005] But in the process of implementing the technical scheme of the embodiment of the application, the application finds that the above-mentioned technology at least has the following technical problems:

[0006] Because the high-power liquid cooling charging system often cannot efficiently export a large amount of heat in time under high heat load conditions, the temperature of the charging pile power module and the charging gun wire rapidly rises, which not only increases the system energy consumption, but also easily causes the internal precision components to be polluted by the cooling liquid due to the gun wire damage or leakage, causing insulation failure and fault risk of the equipment, and the frequent start and stop of large-scale heat dissipation equipment superimposes the power grid load fluctuation, further causing overheating out of control, safety hazards and local power grid instability in the charging process.

[0007] Therefore, in view of the above problems, there is an urgent need for an intelligent liquid cooling charging system and method based on plate exchange isolation and phase change heat storage. SUMMARY

[0008] Technical problems solved

[0009] In view of the deficiencies of the prior art, the application provides an intelligent liquid cooling charging system and method based on plate exchange isolation and phase change heat storage, which solves the problem that the cooling circuit of the high-power liquid cooling charging system cannot export a large amount of heat in time under high heat load conditions, which easily leads to temperature rise of the power module and the charging gun wire, energy consumption increase, component pollution and equipment failure, and further causes safety hazards in the charging process.

[0010] Technical scheme

[0011] To achieve the above purpose, the application realizes the following technical scheme: an intelligent liquid cooling charging method based on plate exchange isolation and phase change heat storage, comprising the following steps: S1, real-time acquisition of liquid cooling full loop working condition data, data preprocessing of the liquid cooling full loop working condition data and real-time storage; S2, real-time judgment of the health state of the plate heat exchanger based on the preprocessed liquid cooling full loop working condition data, adjustment of the liquid cooling parameters according to the health state of the plate heat exchanger, guarantee of the heat exchange efficiency and charging safety; S3, real-time evaluation of the heat storage capacity of the phase change material heat storage unit based on the preprocessed liquid cooling full loop working condition data, and taking high-load charging safety and heat management stable maintenance measures according to the heat storage capacity of the phase change material heat storage unit; S4, comprehensive analysis of the liquid cooling full loop working condition data, dynamic evaluation of the temperature control and energy consumption state, and dynamic quantification of the comprehensive performance of each group of flow distribution combined with the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, selection of a flow distribution scheme according to the comprehensive performance and adjustment of the pump speed, and liquid cooling global collaborative optimization.

[0012] Further, the specific process of collecting liquid cooling full loop working condition data in real time, pre-processing the liquid cooling full loop working condition data and storing the liquid cooling full loop working condition data in real time is as follows: in the process of liquid cooling charging, through the deployment of multiple types of high-precision sensors at key nodes in the double-loop structure physically isolated by the primary side inner loop and the secondary side outer loop, the liquid cooling full loop working condition data is collected in real time, the liquid cooling full loop working condition data including: charging power, primary side liquid cooling inlet temperature, primary side liquid cooling outlet temperature, secondary side liquid cooling inlet temperature, secondary side liquid cooling outlet temperature, plate heat exchanger inlet temperature, plate heat exchanger outlet temperature, PCM unit temperature, primary side liquid cooling flow, secondary side liquid cooling flow, primary side variable frequency pump power and secondary side variable frequency pump power, and the primary side coolant specific heat capacity, the secondary side coolant specific heat capacity, the PCM material latent heat, the PCM material fixed mass and the PCM material fixed effective thickness are synchronously called from the material parameter library; the collected liquid cooling full loop working condition data is time-synchronized through unified time stamp alignment, and the noise filtering and abnormal correction are performed through the outlier rejection and sliding window smoothing algorithm; for the missing and abnormal sampling points, the interpolation and data completion algorithm is used to restore the continuity; the liquid cooling full loop working condition data is subjected to data non-dimensional normalization and unit standardization processing; the liquid cooling charging condition database is established, and the liquid cooling full loop working condition data with time stamp is stored in the liquid cooling charging condition database.

[0013] Further, based on the pre-processed liquid cooling full loop working condition data, the specific process of judging the health status of the plate heat exchanger in real time is as follows: between the primary side inner loop and the secondary side outer loop, there is a high-efficiency plate heat exchanger for physical isolation of the cooling liquid and efficient energy exchange; the primary side liquid cooling inlet temperature, the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the primary side coolant specific heat capacity are obtained in real time, the difference between the primary side liquid cooling inlet temperature and the primary side liquid cooling outlet temperature is multiplied by the primary side liquid cooling flow and the primary side coolant specific heat capacity to obtain the primary side heat power, and the primary side heat power is taken as the total heat exchange amount of the plate heat exchanger; the secondary side liquid cooling outlet temperature is obtained, and the apparent thermal resistance value is obtained by dividing the difference between the primary side liquid cooling inlet temperature and the secondary side liquid cooling outlet temperature by the total heat exchange amount of the plate heat exchanger; the secondary side liquid cooling inlet temperature, the secondary side liquid cooling outlet temperature, the secondary side liquid cooling flow and the secondary side coolant specific heat capacity are obtained, the difference between the secondary side liquid cooling outlet temperature and the secondary side liquid cooling inlet temperature is multiplied by the secondary side liquid cooling flow and the secondary side coolant specific heat capacity to obtain the secondary side heat power; the absolute difference between the primary side heat power and the secondary side heat power is divided by the total heat exchange amount of the plate heat exchanger, and multiplied by the energy mismatch weight factor to obtain the energy mismatch correction value; the apparent thermal resistance value and the energy mismatch correction value are added to obtain the plate heat exchanger thermal resistance judgment value.

[0014] Further, the specific process of adjusting the liquid cooling parameters according to the health state of the plate heat exchanger to ensure the heat exchange efficiency and charging safety is as follows: the plate heat exchanger thermal resistance judgment value is written into the liquid cooling charging condition database in real time, and is compared with the thermal resistance threshold value, when the plate heat exchanger thermal resistance judgment value is less than or equal to the thermal resistance threshold value, it is determined that the plate heat exchanger is in a healthy and efficient condition, the conventional liquid cooling operation is maintained, and no additional adjustment is made; when the plate heat exchanger thermal resistance judgment value is greater than the thermal resistance threshold value, the positive and negative of the energy mismatch correction value is judged, and it is identified whether the energy mismatch exists in the primary side inner circulation loop or the secondary side outer circulation loop, the liquid cooling flow and the frequency conversion pump speed distribution of each loop are adjusted according to the energy mismatch source, and the plate heat exchanger cleaning and maintenance prompt is issued; if the plate heat exchanger thermal resistance judgment value is still greater than the thermal resistance threshold value within the maximum allowable threshold value, the charging pile and the charging gun line are temporarily reduced in load and limited in flow.

[0015] Further, based on the preprocessed liquid cooling full loop condition data, the specific process of real-time evaluating the heat storage capacity of the phase change material heat storage unit is as follows: in the primary side inner circulation loop, the phase change material heat storage unit is arranged in series, which is used to dynamically absorb and buffer the waste heat of the charging pile core components during the charging process, the plate exchange outlet temperature, the PCM unit temperature and the fixed effective thickness of the PCM material are obtained in real time, the difference between the plate exchange outlet temperature and the PCM unit temperature is divided by the fixed effective thickness of the PCM material, and multiplied by the heat exchange weight factor to obtain the heat exchange index factor, the reciprocal of the heat exchange index factor is taken as the exponential power to obtain the nonlinear heat absorption reduction value, and the constant one is subtracted from the nonlinear heat absorption reduction value to obtain the heat absorption response term; the fixed mass of the PCM material, the latent heat of the PCM material and the primary side heat power are obtained in real time, based on the sliding time window, the primary side heat power in the sliding window of the period is counted and the maximum value is selected to obtain the period heat flow peak value; the product of the fixed mass of the PCM material, the latent heat of the PCM material and the heat absorption response term is divided by the product of the period heat flow peak value and the sliding time window length to obtain the heat storage response capacity value.

[0016] Further, according to the heat storage capacity of the phase change material heat storage unit, the specific process of taking high-load charging safety and thermal management stable maintenance measures is: the heat storage response capacity value is written into the liquid cooling charging working condition database in real time, and compared with the heat storage threshold value, when the heat storage response capacity value is greater than or equal to the heat storage threshold value, it is determined that the phase change material heat storage is sufficient, the current heat buffer working mode mainly using PCM heat storage unit is maintained, and the PCM heat storage unit is continuously used to carry out waste heat peak clipping and heat regulation, without cooling path switching and maintenance intervention; when the heat storage response capacity value is less than the heat storage threshold value, it is determined that the phase change material heat storage is insufficient, and the cooling path mainly using the external radiator and the fan is switched to; the prompt for replacing and supplementing the phase change material module is triggered; and during the phase change material heat storage is insufficient, the charging process with charging power greater than the heat load threshold value is delayed, and the equipment with charging power less than or equal to the heat load threshold value is preferentially arranged to charge.

[0017] Further, the specific process of comprehensively analyzing the liquid cooling full loop working condition data and dynamically evaluating the temperature control and energy consumption state is: the primary side liquid cooling outlet temperature and the secondary side liquid cooling outlet temperature are recorded as the key position temperatures of the primary side internal circulation loop and the secondary side external circulation loop respectively; the key position temperature is obtained, the key position temperature mean value, the key position temperature standard deviation and the key position temperature variance are calculated based on the sliding time window, the key position temperature mean value plus the key position temperature standard deviation is used as the target temperature control reference value, the square of the difference between the current key position temperature and the target temperature control reference value is calculated, and the temperature control deviation term is obtained by dividing the key position temperature variance; the primary side variable frequency pump power and the secondary side variable frequency pump power are obtained, the primary side variable frequency pump power and the secondary side variable frequency pump power are added to obtain the total variable frequency pump power, the total variable frequency pump power mean value is calculated based on the sliding time window as the pump energy consumption reference value, and the pump energy consumption term is obtained by dividing the current total variable frequency pump power by the pump energy consumption reference value; based on the sliding time window, the key position temperature rate is calculated using the difference method, and the average value of the key position temperature rate in the window is obtained as the temperature rise rate reference value, and the temperature rise rate term is obtained by dividing the absolute value of the current key position temperature rate by the temperature rise rate reference value.

[0018] Further, in combination with the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, the specific process of dynamically quantifying the comprehensive performance of each group of flow distribution is: the plate heat exchanger thermal resistance judgment value and the heat storage response capacity value are obtained; the plate heat exchanger thermal resistance judgment value is compared with the thermal resistance threshold value, if the plate heat exchanger thermal resistance judgment value is greater than the thermal resistance threshold value, the positive difference is taken, otherwise zero is taken, and the plate heat exchanger thermal resistance constraint term is obtained; the heat storage response capacity value is compared with the heat storage threshold value, if the heat storage response capacity value is less than the heat storage threshold value, the positive difference is taken, otherwise zero is taken, and the heat storage capacity constraint term is obtained; the temperature control deviation term, the pump energy consumption term, the temperature rise rate term, the plate heat exchanger thermal resistance constraint term and the heat storage capacity constraint term are added to obtain the flow distribution comprehensive evaluation value.

[0019] Further, the specific process of selecting a flow distribution scheme according to comprehensive performance and adjusting pump speed, and performing liquid cooling global collaborative optimization is: for the primary side internal circulation loop and the secondary side external circulation loop, the outlet temperature of the primary side liquid cooling and the outlet temperature of the secondary side liquid cooling are taken as the key part temperatures, and the comprehensive evaluation value of each flow distribution is calculated in real time; based on a sliding time window, all historical liquid cooling flow combinations are traversed, and the liquid cooling flow combination with the minimum comprehensive evaluation value of flow distribution is selected as the liquid cooling flow set value of the primary side internal circulation loop and the secondary side external circulation loop, and is respectively taken as the real-time adjustment target of the primary side variable frequency pump speed and the secondary side variable frequency pump speed, and the corresponding pump speed control instruction is output, and the flow distribution of the double circulation is performed; if the duration of the comprehensive evaluation value of flow distribution being greater than the safety threshold value exceeds the maximum allowable threshold value, a risk warning is issued, and a temporary load reduction, flow limiting and step charging strategy is executed; all historical comprehensive evaluation values of flow distribution and corresponding pump speed adjustment targets are written into a liquid cooling charging condition database, a sliding window adaptive statistical and anomaly detection algorithm is used, and in combination with a ridge regression algorithm, the target temperature control reference value, the pump energy consumption benchmark value, the temperature rise rate benchmark value, the thermal resistance threshold value and the heat storage threshold value are continuously corrected.

[0020] The second aspect of the present application provides an intelligent liquid cooling charging system based on plate heat exchange isolation and phase change heat storage, comprising: a liquid cooling charging data acquisition and preprocessing module, used for real-time acquisition of liquid cooling full loop working condition data, data preprocessing of the liquid cooling full loop working condition data and real-time storage; a plate heat exchange isolation and thermal resistance discrimination module, used for real-time judgment of the health state of the plate heat exchanger based on the preprocessed liquid cooling full loop working condition data, adjustment of the liquid cooling parameters according to the health state of the plate heat exchanger, guarantee of the heat exchange efficiency and charging safety; a phase change heat storage unit and heat storage response module, used for real-time evaluation of the heat storage capacity of the phase change material heat storage unit based on the preprocessed liquid cooling full loop working condition data, and taking high-load charging safety and thermal management stable maintenance measures according to the heat storage capacity of the phase change material heat storage unit; a flow distribution and pump control energy consumption optimization module, used for comprehensive analysis of the liquid cooling full loop working condition data, dynamic evaluation of the temperature control and energy consumption state, dynamic quantification of the comprehensive performance of each group of flow distribution in combination with the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, selection of a flow distribution scheme according to the comprehensive performance and adjustment of the pump speed, and performance of liquid cooling global collaborative optimization.

[0021] Advantages

[0022] The present application has the following advantages:

[0023] (1) The present application can accurately reflect the heat conduction capacity and energy mismatch state of the heat exchanger in real time by constructing a multi-parameter fusion plate heat exchanger thermal resistance dynamic discrimination mechanism, and timely triggers automatic cleaning, maintenance and load reduction measures, significantly prolongs the service life of the equipment and effectively prevents safety hazards caused by cooling failure.

[0024] (2) The application can absorb excess heat in high heat load and charging fluctuation scenarios, significantly buffer power impact, and inhibit core component overheating, to realize adaptive peak regulation and safety margin improvement of thermal management, through the integration of phase change material heat storage unit, nonlinear dynamic evaluation of heat storage response capacity, and threshold adaptive judgment.

[0025] (3) The application can realize dynamic optimal distribution of double-loop flow and pump speed control, significantly reduce overall energy consumption and operating cost under the premise of ensuring temperature control safety, through real-time data acquisition and sliding window adaptive preprocessing of full-loop multi-node, normalized modeling and joint optimization of temperature control deviation, pump energy consumption, and temperature rise rate multi-dimensional indicators.

[0026] (4) The application can identify and respond to thermal shock and heat storage deficiency in the charging process, and implement safety strategies such as step charging, temporary load reduction, and priority low-load charging, to effectively reduce thermal runaway and safety risks in high-power charging process, and realize intelligent and safe operation without manual intervention, through the integration of high heat load discrimination and delayed task scheduling mechanism.

[0027] Of course, implementing any product of the application does not necessarily require all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Flow chart of intelligent liquid cooling charging method based on plate heat exchanger isolation and phase change heat storage;

[0029] Figure 2 Module diagram of intelligent liquid cooling charging system based on plate heat exchanger isolation and phase change heat storage;

[0030] Figure 3 Double-loop structure principle diagram of intelligent liquid cooling charging based on plate heat exchanger isolation and phase change heat storage;

[0031] Figure 4 Trend chart of plate heat exchanger thermal resistance judgment value. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. As understood by those skilled in the art, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0033] Please refer to Figures 1-4 The embodiments of the application provide a technical solution: an intelligent liquid cooling charging system and method based on plate heat exchanger isolation and phase change heat storage, as shown inFigure 1 As shown, comprising the following steps: S1, real-time acquisition of liquid cooling full loop working condition data, data preprocessing of liquid cooling full loop working condition data and real-time storage; S2, based on the preprocessed liquid cooling full loop working condition data, the health status of the plate heat exchanger is judged in real time, the liquid cooling parameters are adjusted according to the health status of the plate heat exchanger, and the heat exchange efficiency and the charging safety are guaranteed; S3, based on the preprocessed liquid cooling full loop working condition data, the heat storage capacity of the phase change material heat storage unit is evaluated in real time, and according to the heat storage capacity of the phase change material heat storage unit, high load charging safety and heat management stable maintenance measures are taken; S4, comprehensive analysis of liquid cooling full loop working condition data, dynamic evaluation of temperature control and energy consumption state, and combined with the health status of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, the comprehensive performance of each group of flow distribution is dynamically quantified, the flow distribution scheme is selected according to the comprehensive performance, the pump speed is adjusted, and the liquid cooling global collaborative optimization is carried out.

[0034] Specifically, the specific process of real-time acquisition of liquid cooling full loop working condition data, data preprocessing of liquid cooling full loop working condition data and real-time storage is as follows: in the process of liquid cooling charging operation, through the deployment of multiple types of high-precision sensors at the key nodes in the double-loop structure physically isolated by the primary side inner loop and the secondary side outer loop, the liquid cooling full loop working condition data is acquired in real time, wherein the primary side inner loop is responsible for cooling the power conversion elements inside the charging pile, and the secondary side outer loop is responsible for cooling the charging gun line, the liquid cooling full loop working condition data includes: charging power, primary side liquid cooling inlet temperature, primary side liquid cooling outlet temperature, secondary side liquid cooling inlet temperature, secondary side liquid cooling outlet temperature, plate heat exchanger inlet temperature, plate heat exchanger outlet temperature, PCM unit temperature, primary side liquid cooling flow, secondary side liquid cooling flow, primary side variable frequency pump power and secondary side variable frequency pump power, the specific heat capacity of the primary side cooling liquid, the specific heat capacity of the secondary side cooling liquid, the latent heat of the PCM material, the fixed mass of the PCM material and the fixed effective thickness of the PCM material are synchronously called from the material parameter library; wherein the charging power is the actual charging instantaneous output power of the main loop, the liquid cooling inlet and outlet temperatures are the real-time temperatures of the cooling liquid at the module nodes flowing in and out of the corresponding pipeline, the plate heat exchanger inlet and outlet temperatures respectively reflect the instantaneous thermal state of the fluid on both sides before and after energy exchange, and the PCM unit temperature is the medium temperature inside the phase change energy storage unit monitored in real time; the primary side liquid cooling flow and the secondary side liquid cooling flow are continuously collected by the flow meter, and the variable frequency pump power is the real-time power consumption of each pump, which can be measured by the motor driver; the specific heat capacity of the cooling liquid and the PCM parameters are process constants. The collected liquid cooling full loop working condition data is time-synchronized by unified time stamp alignment, so that the liquid cooling full loop working condition data has comparability and synchronicity in subsequent analysis, and noise filtering and abnormal correction are performed by using the outlier rejection and sliding window smoothing algorithm, specifically, the data points exceeding the physical feasible interval are identified and corrected by using the 3σ principle and the quantile method; for missing and abnormal sampling points, interpolation and data completion algorithm is used to restore continuity, linear interpolation is used to complete to ensure the time sequence of data; and the liquid cooling full loop working condition data is subjected to data dimensionless normalization and unit standardization processing, so as to unify the scales and units of different physical quantities and eliminate the influence of dimension; a liquid cooling charging condition database is established, the liquid cooling full loop working condition data is stored in the liquid cooling charging condition database with time stamp, each group of data is stored with complete time stamp, data source identification and acquisition state code, which is convenient for tracing, playback and batch analysis.

[0035] As Figure 3As shown, it is the intelligent liquid cooling charging double-loop structure principle diagram based on plate heat exchanger isolation and phase change heat storage. The modular double-loop liquid cooling structure with primary side internal circulation and secondary side external circulation, combined with high-efficiency plate heat exchanger and phase change material storage tank, realizes the safety, precision, high efficiency and intelligent adaptive control of the whole link of the charging pile in the high-power charging scene. The primary side internal circulation, i.e. the precision cooling loop, is designed for cooling the high heat density core power module inside the charging pile. The high insulation and high thermal conductivity cooling liquid flows through the power module cold plate, absorbs its working heat, and the temperature rises. The intelligent controller collects the liquid cooling loop working condition data including inlet and outlet temperature and flow data in real time, dynamically determines the health status of the plate heat exchanger. If abnormal, the pump speed and flow adaptive distribution and plate heat exchanger maintenance prompt are linked, and temporary load reduction and flow limitation are performed to ensure the safe operation of the power module. The high-temperature cooling liquid flows through the plate heat exchanger, exchanges heat with the secondary side, and is pumped to the PCM storage tank. Here, the intelligent controller synchronously collects the plate heat exchanger outlet and PCM temperature and flow data, and evaluates the PCM heat storage response capability, dynamically quantifies the current heat absorption peak shaving capability of the phase change material heat storage module. If the heat storage capacity is sufficient, continue to use PCM peak shaving; if not, switch the heat dissipation path, delay high heat load charging and issue maintenance prompt to realize self-protection under high heat shock. The secondary side external circulation, i.e. the large load cooling loop, is responsible for cooling the charging gun line and cable, which is the main heat dissipation path. The low-cost cooling liquid flows in the gun line to absorb current heat, further absorbs heat through the plate heat exchanger, and is pumped to the large heat sink and fan for forced heat dissipation, and finally returns to the gun line. The intelligent controller collects the liquid cooling loop working condition data in real time, and all real-time data are included in the flow distribution comprehensive evaluation value calculation, which comprehensively considers temperature control deviation, energy consumption, temperature rise rate, thermal resistance and heat storage constraints, and automatically optimizes the primary side and secondary side flow distribution and pump speed adjustment to realize global adaptive intelligent control. The plate heat exchanger is the energy efficient exchange interface between the two loops, which uses physical isolation to ensure that the cooling liquids do not mix and eliminate the risk of contamination. The intelligent control unit cooperates with the cloud to combine local and cloud information, triggers cooling path switching, pump speed and fan speed adjustment, heat storage peak shaving, temporary flow limitation and operation and maintenance warning multi-mode control as needed. It realizes temperature control safety, energy consumption optimization and fault self-recovery in the whole scene of the charging pile, and supports unattended and remote collaboration. Through the cooperative architecture of double-loop liquid cooling, plate heat exchanger isolation, phase change heat storage and intelligent control, three core algorithms are used to realize hierarchical temperature control and multi-layer protection of power modules and gun lines, and to enable high safety, intelligence, low energy consumption and long service life operation of high-power liquid cooling charging equipment.

[0036] In this embodiment, by constructing a double-circuit liquid cooling system with physical isolation between the primary side and the secondary side, and laying multiple types of high-precision sensors in the liquid cooling charging full-link, combined with unified time stamp alignment, abnormality rejection, sliding window smoothing, interpolation completion, normalization and unit standardization multiple data processing methods, the automatic, full-process and standardized collection and storage of the working condition data of each key node of the primary side and the secondary side cooling circuit are realized, which greatly improves the time sequence consistency, comparability and continuity of the data. It provides a complete and reliable data basis for subsequent thermal management optimization, equipment health discrimination and intelligent operation and maintenance strategy, effectively guarantees the safety, intelligence and traceability of operation.

[0037] Specifically, based on the pre-processed liquid cooling full-link working condition data, the specific process of real-time judging the health status of the plate heat exchanger is as follows: between the primary side inner circulation loop and the secondary side outer circulation loop, there is a high-efficiency plate heat exchanger for physical isolation and energy efficient exchange of the cooling liquid; the plate heat exchanger is a compact structure and high heat transfer efficiency heat exchange equipment, which can realize heat transfer between two cooling liquids on both sides of the metal plate, prevent mixing of different cooling media, and ensure the safety and insulation of the primary side precision circuit. The primary side liquid cooling inlet temperature, the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the specific heat capacity of the primary side cooling liquid are obtained, the difference between the primary side liquid cooling inlet temperature and the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the specific heat capacity of the primary side cooling liquid are multiplied to obtain the primary side heat power, and the primary side heat power is taken as the total heat exchange amount of the plate heat exchanger, which reflects the heat absorbed and transferred by the cold plate and the plate heat exchanger per unit time; the difference between the primary side liquid cooling inlet temperature and the secondary side liquid cooling outlet temperature is divided by the total heat exchange amount of the plate heat exchanger to obtain the apparent thermal resistance value, which is essentially the thermal resistance in the process of heat transfer through the plate heat exchanger, and is used for quantitative analysis of heat exchange efficiency and thermal resistance abnormality; the secondary side liquid cooling inlet temperature, the secondary side liquid cooling outlet temperature, the secondary side liquid cooling flow and the specific heat capacity of the secondary side cooling liquid are obtained, the difference between the secondary side liquid cooling outlet temperature and the secondary side liquid cooling inlet temperature, the secondary side liquid cooling flow and the specific heat capacity of the secondary side cooling liquid are multiplied to obtain the secondary side heat power, which reflects the heat absorption and final heat dissipation capacity of the heavy load circuit; the absolute difference between the primary side heat power and the secondary side heat power is divided by the total heat exchange amount of the plate heat exchanger, and multiplied by the energy mismatch weight factor to obtain the energy mismatch correction value; the energy mismatch weight factor reflects the imbalance of heat exchange between the cold side and the hot side caused by flow distribution, blockage and pollution, and the value can be obtained by standardized self-learning based on historical samples. The apparent thermal resistance value and the energy mismatch correction value are added to obtain the plate heat exchanger thermal resistance judgment value, which is used as a comprehensive criterion for measuring the current health status and heat transfer efficiency of the plate heat exchanger.

[0038] Specifically, based on the pre-processed liquid cooling full-link working condition data, the specific process of real-time judging the health status of the plate heat exchanger is as follows: between the primary side inner circulation loop and the secondary side outer circulation loop, there is a high-efficiency plate heat exchanger for physical isolation and energy efficient exchange of the cooling liquid; the plate heat exchanger is a compact structure and high heat transfer efficiency heat exchange equipment, which can realize heat transfer between two cooling liquids on both sides of the metal plate, prevent mixing of different cooling media, and ensure the safety and insulation of the primary side precision circuit. The primary side liquid cooling inlet temperature, the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the specific heat capacity of the primary side cooling liquid are obtained, the difference between the primary side liquid cooling inlet temperature and the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the specific heat capacity of the primary side cooling liquid are multiplied to obtain the primary side heat power, and the primary side heat power is taken as the total heat exchange amount of the plate heat exchanger, which reflects the heat absorbed and transferred by the cold plate and the plate heat exchanger per unit time; the difference between the primary side liquid cooling inlet temperature and the secondary side liquid cooling outlet temperature is divided by the total heat exchange amount of the plate heat exchanger to obtain the apparent thermal resistance value, which is essentially the thermal resistance in the process of heat transfer through the plate heat exchanger, and is used for quantitative analysis of heat exchange efficiency and thermal resistance abnormality; the secondary side liquid cooling inlet temperature, the secondary side liquid cooling outlet temperature, the secondary side liquid cooling flow and the specific heat capacity of the secondary side cooling liquid are obtained, the difference between the secondary side liquid cooling outlet temperature and the secondary side liquid cooling inlet temperature, the secondary side liquid cooling flow and the specific heat capacity of the secondary side cooling liquid are multiplied to obtain the secondary side heat power, which reflects the heat absorption and final heat dissipation capacity of the heavy load circuit; the absolute difference between the primary side heat power and the secondary side heat power is divided by the total heat exchange amount of the plate heat exchanger, and multiplied by the energy mismatch weight factor to obtain the energy mismatch correction value; the energy mismatch weight factor reflects the imbalance of heat exchange between the cold side and the hot side caused by flow distribution, blockage and pollution, and the value can be obtained by standardized self-learning based on historical samples. The apparent thermal resistance value and the energy mismatch correction value are added to obtain the plate heat exchanger thermal resistance judgment value, which is used as a comprehensive criterion for measuring the current health status and heat transfer efficiency of the plate heat exchanger.

[0039] ;

[0040] in the formula, represents the plate heat exchanger thermal resistance judgment value, used for dynamically and comprehensively evaluating the current heat conduction capacity of the plate heat exchanger and the energy balance condition of the cold and hot sides in the liquid cooling real-time operation process, reflecting in time whether the heat exchange efficiency is reduced, whether the flow and temperature difference of the cold and hot sides are mismatched, and whether there is a potential risk of blockage and pollution, and is a key quantitative index of self-diagnosis and intelligent operation and maintenance; represents the primary side liquid cooling inlet temperature, reflecting the initial temperature of the high-heat component in the charging pile; represents the primary side liquid cooling outlet temperature, reflecting the temperature after heat transfer in the charging pile; represents the secondary side liquid cooling inlet temperature, reflecting the initial temperature of the charging gun wire cooling circuit; represents the secondary side liquid cooling outlet temperature, reflecting the fluid temperature after cooling of the charging gun wire; represents the primary side liquid cooling flow, determining the heat transfer rate in the charging pile circuit; represents the secondary side liquid cooling flow, determining the heat dissipation capacity of the charging gun wire cooling circuit; represents the specific heat capacity of the primary side cooling liquid; represents the specific heat capacity of the secondary side cooling liquid, and the specific heat capacities of the cooling liquids are both constant values, determining the heat carrying capacity of unit mass fluid; represents the total heat exchange capacity of the plate, i.e. the primary side heat power, representing the main heat exchange capacity; represents the apparent thermal resistance value, directly quantifying the ratio of the temperature difference between the primary side inlet and the secondary side outlet to the primary side heat power, reflecting the instantaneous thermal resistance of the whole heat exchanger, i.e. the temperature difference required for unit heat exchange capacity, and can directly reveal whether the whole heat exchanger has thermal degradation; represents the energy mismatch correction value, reflecting the instantaneous heat mismatch caused by the flow and temperature difference of the cold and hot sides, and the greater the absolute value, the greater the difference between the actual heat exchange capacities of the cold and hot flow sides, indicating problems such as uneven flow distribution and heat exchange imbalance; represents the energy mismatch weight factor, used for adjusting the influence weight of the flow and temperature difference mismatch on the criterion, and the mean value, standard deviation and distribution characteristics of the energy mismatch correction value and the apparent thermal resistance value in the historical samples are counted, the data-driven ratio calibration method is adopted, the two types of data are standardized to make the dimension and numerical level close, and then the energy mismatch weight factor is obtained by combining the ROC curve test, and the value range is between 0.5 and 1.5.

[0041] In this embodiment, Table 1 is a data table of thermal resistance judgment values ​​for the plate heat exchanger. The energy mismatch weighting factor is set to 1.0, the specific heat capacity of the primary side coolant is 3500, and the specific heat capacity of the secondary side coolant is 4200. The table details the primary side liquid coolant inlet temperature, primary side liquid coolant outlet temperature, secondary side liquid coolant inlet temperature, secondary side liquid coolant outlet temperature, primary side liquid coolant flow rate, secondary side liquid coolant flow rate, and plate heat exchanger thermal resistance judgment values ​​at five different times. Specifically, time 1 corresponds to a primary side liquid coolant inlet temperature of 42.0°C, a primary side liquid coolant outlet temperature of 37.5°C, and a secondary side liquid coolant outlet temperature of 4200°C. The primary side liquid cooling inlet temperature is 32.6°C, the secondary side liquid cooling outlet temperature is 36.2°C, the primary side liquid cooling flow rate is 15.0 L / min, the secondary side liquid cooling flow rate is 13.0 L / min, and the plate heat exchanger thermal resistance is 0.168 ohms. At time 2, the primary side liquid cooling inlet temperature is 41.8°C, the primary side liquid cooling outlet temperature is 37.0°C, the secondary side liquid cooling inlet temperature is 32.8°C, the secondary side liquid cooling outlet temperature is 36.8°C, the primary side liquid cooling flow rate is 15.0 L / min, and the secondary side liquid cooling flow rate is 12.8 L / min. The plate heat exchanger thermal resistance is... The resistance judgment value is 0.147; at time 3, the primary side liquid cooling inlet temperature is 44.5°C, the primary side liquid cooling outlet temperature is 39.0°C, the secondary side liquid cooling inlet temperature is 33.1°C, the secondary side liquid cooling outlet temperature is 37.0°C, the primary side liquid cooling flow rate is 16.0 L / min, the secondary side liquid cooling flow rate is 13.5 L / min, and the plate heat exchanger thermal resistance judgment value is 0.282; at time 4, the primary side liquid cooling inlet temperature is 43.0°C, the primary side liquid cooling outlet temperature is 37.8°C, and the secondary side liquid cooling inlet temperature is 32°C. At time 5, the secondary liquid cooling outlet temperature is 35.7°C, the primary liquid cooling flow rate is 15.5 L / min, the secondary liquid cooling flow rate is 13.2 L / min, and the thermal resistance of the plate heat exchanger is 0.371. At time 5, the primary liquid cooling inlet temperature is 40.7°C, the primary liquid cooling outlet temperature is 36.2°C, the secondary liquid cooling inlet temperature is 31.8°C, the secondary liquid cooling outlet temperature is 34.9°C, the primary liquid cooling flow rate is 14.5 L / min, the secondary liquid cooling flow rate is 12.7 L / min, and the thermal resistance of the plate heat exchanger is 0.276.

[0042] Table 1. Data on Thermal Resistance Judgment Values ​​for Plate Heat Exchangers

[0043]

[0044] like Figure 4 The figure shows the trend of the thermal resistance judgment value of a plate heat exchanger. It illustrates the changing trend of the thermal resistance judgment value of the plate heat exchanger at five time points. The horizontal axis represents the time number, and the vertical axis represents the thermal resistance judgment value of the plate heat exchanger. Each data point is connected by a broken line. (Based on Table 1 and...) Figure 4It can be seen that the plate heat exchanger thermal resistance judgment value of time 1 and time 2 is low, which shows that the plate heat exchanger exchanges heat well and is in a high-efficiency heat exchange and healthy running state; the plate heat exchanger thermal resistance judgment value rises sharply from time 3, and reaches the highest point at time 4, which shows that the plate heat exchanger heat transfer performance deteriorates, and problems such as scaling, clogging and uneven flow distribution may occur; although it falls slightly at time 5, it is still higher than the initial stage, which indicates that the plate heat exchanger has not fully recovered and needs to be further monitored.

[0045] In the embodiment, by collecting and analyzing the liquid cooling full-loop working condition data in real time, combining the comprehensive judgment of the plate heat exchanger thermal power, apparent thermal resistance value and energy mismatch correction value, the quantitative, dynamic and traceable monitoring of the heat exchanger health state is realized. By using physical isolation and energy efficient exchange, the potential abnormalities of heat exchanger clogging, pollution and flow mismatch can be accurately reflected and timely identified, and the safety, reliability and operation intelligent level of the charging full process are improved.

[0046] Specifically, the specific process of adjusting the liquid cooling parameters according to the health status of the plate heat exchanger to ensure the heat exchange efficiency and charging safety is as follows: the plate heat exchanger thermal resistance judgment value is written into the liquid cooling charging working condition database in real time, and is compared with the thermal resistance threshold value, when the plate heat exchanger thermal resistance judgment value is less than or equal to the thermal resistance threshold value, it is determined that the plate heat exchanger is in a healthy and efficient working condition, and the conventional liquid cooling operation is maintained without additional adjustment; when the plate heat exchanger thermal resistance judgment value is greater than the thermal resistance threshold value, the positive and negative of the energy mismatch correction value is judged, and it is identified whether the primary side inner circulation loop or the secondary side outer circulation loop exists energy mismatch, the liquid cooling flow and the frequency conversion pump speed distribution of each loop are adjusted according to the source of energy mismatch; wherein the energy mismatch correction value is the absolute difference value of the primary side heat power and the secondary side heat power normalized, and its positive and negative judgment is as follows: if the energy mismatch correction value is positive, it means that the primary side heat absorption is much greater than the secondary side heat dissipation, there is a problem of insufficient secondary side flow, reduced heat dissipation efficiency or blockage; if the energy mismatch correction value is negative, it means that the secondary side heat dissipation capacity is stronger than the primary side heat absorption, which may be a problem of insufficient primary side flow and local heat transfer abnormality. The specific implementation method is as follows: according to the positive and negative of the energy mismatch correction value, the intelligent control unit preferentially increases the circulating pump speed and the liquid cooling flow of the energy mismatch side, and reduces the flow distribution of the non-mismatch side, so as to realize the dynamic balance of the cold and hot sides and the recovery of the heat exchange efficiency. For example, if the primary side is mismatched, the target speed of the primary side frequency conversion pump P1 and the liquid cooling flow are automatically increased, and the parameters of the secondary side frequency conversion pump P2 are adjusted moderately, and vice versa. At the same time, combined with the historical liquid cooling charging operation curve of the liquid cooling charging working condition database, PID closed loop regulation and sliding window adaptive algorithm are adopted to adjust the liquid cooling flow distribution ratio step by step until the energy mismatch correction value is reduced to below the mismatch threshold value. And a plate heat exchanger cleaning and maintenance prompt is issued to remind the operation and maintenance personnel to regularly check whether the heat exchanger has physical defects such as scaling, pollution and micro blockage, so as to reduce the influence of continuous high thermal resistance on safe operation; if the plate heat exchanger thermal resistance judgment value is still greater than the thermal resistance threshold value within the maximum allowable threshold value, the charging pile and the charging gun line are temporarily reduced and limited in flow operation, which effectively prevents temperature out of control and component damage.

[0047] In the embodiment, by comparing the plate heat exchanger thermal resistance judgment value with the thermal resistance threshold value in real time, combining the positive and negative judgment of the energy mismatch correction value and the intelligent pump control adjustment, the dynamic optimization of the cold and hot loop flow distribution and the energy balance are realized, which can accurately identify and timely respond to the abnormal conditions of insufficient secondary side or primary side flow, reduced heat dissipation efficiency and local blockage. Through the synergistic effect of historical operation data and closed loop adaptive algorithm, the continuity and consistency of data analysis are effectively improved, the heat exchange efficiency and system safety are guaranteed, and through automatic maintenance warning and flow limiting and load reducing protection measures, the risk of equipment damage and temperature control out of control caused by thermal resistance abnormality is greatly reduced, and the overall intelligent operation and maintenance level and overall reliability are significantly enhanced.

[0048] Specifically, based on the pre-processed liquid cooling full loop working condition data, the specific process of real-time evaluation of the heat storage capacity of the phase change material heat storage unit is: in the primary side internal circulation loop, the phase change material heat storage unit is arranged in series, the PCM heat storage unit is the core heat storage component of the charging pile heat management, which is filled with phase change material with a specific melting temperature, which can absorb or release latent heat during charging to effectively regulate temperature fluctuations, and is used to dynamically absorb and buffer the excess heat of the core components of the charging pile during charging. The plate exchange outlet temperature, the PCM unit temperature and the fixed effective thickness of the PCM material are obtained in real time, wherein the plate exchange outlet temperature reflects the temperature of the primary side cooling liquid before flowing into the PCM unit after heat exchange with the secondary side, the PCM unit temperature is the real-time measured internal medium temperature of the phase change unit, and the fixed effective thickness of the PCM material is the main heat transfer path length of the phase change material; the difference between the plate exchange outlet temperature and the PCM unit temperature is divided by the fixed effective thickness of the PCM material, and multiplied by the heat exchange weight factor to obtain the heat exchange index factor, and the reciprocal of the heat exchange index factor is taken as the exponential power to obtain the nonlinear heat absorption reduction value. The heat absorption response term is obtained by subtracting the nonlinear heat absorption reduction value from the constant; the fixed mass of the PCM material, the latent heat of the PCM material and the primary side heat power are obtained in real time, wherein the fixed mass of the PCM material is the total mass of the actual filling material in the phase change unit, the latent heat of the PCM material is the heat that can be absorbed by unit mass of material when phase change occurs, which is a fixed process parameter, and the primary side heat power is the total heat absorbed by the current loop per unit time; based on the sliding time window, the primary side heat power in the sliding window of the current period is counted and the maximum value is selected to obtain the period heat flow peak value; the product of the fixed mass of the PCM material, the latent heat of the PCM material and the heat absorption response term is divided by the product of the period heat flow peak value and the sliding time window length to obtain the heat storage response capacity value. The heat storage response capacity value quantifies the instantaneous heat absorption peak regulation capacity of the phase change unit under the current temperature difference, structure parameters and heat flow load, and comprehensively reflects the real-time coupling relationship of material thermal characteristics, heat exchange dynamics, structure configuration and charging conditions. It is the core data basis for adaptive adjustment and threshold determination of heat management strategy.

[0049] wherein the specific formula of the heat storage response capacity value is:

[0050] ;

[0051] In the formula, indicates the heat storage response capacity value, which is used to dynamically quantify the instantaneous heat absorption response capacity of the phase change material heat storage unit under the liquid cooling charging system, reflects the actual heat absorption margin that the PCM module can actually bear under the current temperature difference and working condition, and is an important index for judging whether the heat storage can continue to effectively regulate the peak and buffer. It considers the comprehensive influence of multiple factors such as material thermal characteristics, structure size, heat exchange rate, temperature difference driving force and heat flow impact, and embodies the nonlinear and time-varying characteristics of PCM response in actual engineering; PCM mass, determines the upper limit of the total heat that the module can absorb, the greater the mass, the greater the heat storage capacity, and the longer the duration of the buffer charge heat shock; PCM latent heat, reflects the energy that can be absorbed or released per unit mass of material during phase change, the greater the latent heat, the greater the buffering capacity per unit mass; Plate outlet temperature, represents the intensity of the heat flow before being output to the PCM unit, which is the direct temperature difference driving force for PCM heat absorption; PCM unit temperature, reflects the actual temperature inside the phase change module, which affects heat transfer and phase change process progress; PCM material fixed effective thickness, represents the distance that heat needs to pass through, the greater the thickness, the greater the heat transfer resistance, and the slower the response; Peak heat flow in time period, reflects the maximum heat load under actual working conditions, used for normalizing heat storage capacity to ensure that the response capacity evaluation corresponds to the actual heat shock; Sliding time window length, specifies the time scale of this response evaluation, used for dynamic analysis, which can be flexibly adjusted under different working conditions; Heat exchange weight factor, based on historical plate outlet temperature, PCM unit temperature, primary side heat power and phase change material heat storage unit response curve data, obtained by least squares error fitting, the value range is between 0.01 and 1.0; Heat absorption response term, describes the nonlinear dynamic process of actual heat exchange controlled by temperature difference and thickness, which embodies the physical real property of heat storage process, where Reflects the heat driving force.

[0052] In this embodiment, by real-time collection and comprehensive analysis of the temperature, structure and process parameters of the phase change material heat storage unit in the primary side internal circulation loop, the heat storage response capacity of the PCM unit under different charging conditions is accurately quantified using sliding time window statistics and nonlinear heat absorption response model, which effectively reflects the dynamic matching of material thermal properties, heat exchange path and instantaneous heat flow load. Not only improves the dynamic absorption and peak regulation capacity of the waste heat during the charging process, ensures the stability and efficiency of thermal management, but also provides traceable quantitative basis for intelligent adjustment and threshold determination.

[0053] Specifically, according to the heat storage capacity of the phase change material heat storage unit, the specific process of taking high-load charging safety and thermal management stable maintenance measures is: the heat storage response capacity value is written into the liquid cooling charging working condition database in real time, and compared with the heat storage threshold value, when the heat storage response capacity value is greater than or equal to the heat storage threshold value, it is determined that the phase change material heat storage is sufficient, the current heat buffer working mode mainly using PCM heat storage unit is maintained, and the PCM heat storage unit is continuously used to carry out waste heat peak clipping and heat regulation, and cooling path switching and maintenance intervention are not needed; when the heat storage response capacity value is less than the heat storage threshold value, it is determined that the phase change material heat storage is insufficient, and the cooling path mainly using the external radiator and the fan is switched to, the external radiator and the fan are the auxiliary heat dissipation units, when the heat storage capacity of the phase change material is insufficient to cope with high heat load, automatic switching is carried out to ensure the overall temperature control safety; a prompt for replacing and supplementing the phase change material module is triggered, and the intelligent control unit sends a work order on the operation and maintenance platform to remind the background operation and maintenance personnel to replace and supplement the phase change material in time to ensure the continuous high-efficiency peak regulation capacity; and during the phase change material heat storage, the charging process with charging power greater than the heat load threshold value is implemented to delay the task, that is, the power of the charging pile and the charging gun line load is monitored, if the real-time charging power exceeds the heat load threshold value, the task is automatically queued and delayed; the equipment with charging power less than or equal to the heat load threshold value is preferentially arranged to charge first.

[0054] In the embodiment, through dynamic monitoring and threshold comparison of the real-time heat storage capacity of the phase change material heat storage unit, adaptive switching of the thermal management mode and intelligent grading response of the high heat load risk are realized. When the PCM unit heat storage is sufficient, the PCM unit is preferentially used for waste heat peak clipping and heat regulation to ensure efficient buffering and stable temperature control; when the heat storage capacity is insufficient, the external radiator and the fan auxiliary path can be automatically switched to, and a replacement and supplement prompt can be triggered in time to ensure uninterrupted peak regulation capacity. At the same time, combined with real-time power monitoring and queuing scheduling of the charging load, high heat load tasks can be effectively delayed, and low power charging processes are preferentially ensured to proceed smoothly. Not only the thermal safety margin and operation and maintenance intelligent level under variable working conditions are improved, but also the consistency and traceability of data and decision logic are guaranteed, and the stability and safety and reliability of liquid cooling charging are enhanced.

[0055] Specifically, the specific process of dynamically evaluating the temperature control and energy consumption state by comprehensively analyzing the liquid cooling full loop working condition data is as follows: the outlet temperature of the primary side liquid cooling and the outlet temperature of the secondary side liquid cooling are recorded as the key position temperatures of the primary side internal circulation loop and the secondary side external circulation loop respectively, which directly reflects the real-time change of the cooling and heat exchange effect of the loop; the key position temperature is obtained, the mean value of the key position temperature, the standard deviation of the key position temperature and the variance of the key position temperature are calculated based on the sliding time window, the mean value of the key position temperature plus the standard deviation of the key position temperature is used as the target temperature control reference value, the square of the difference between the current key position temperature and the target temperature control reference value is calculated, and the temperature control deviation term is obtained by dividing the variance of the key position temperature, which is used to measure the severity of the current temperature deviating from the target temperature control reference value, to ensure that abnormal temperature rise and refrigeration failure can be found and responded in time; the primary side variable frequency pump power and the secondary side variable frequency pump power are obtained, the primary side variable frequency pump power and the secondary side variable frequency pump power are added to obtain the total variable frequency pump power, which represents the actual power consumed in the cooling liquid circulation process, and based on the sliding time window, the mean value of the total variable frequency pump power is calculated as the pump energy consumption reference value, and the pump energy consumption term is obtained by dividing the current total variable frequency pump power by the pump energy consumption reference value; wherein the mean value of the total variable frequency pump power is calculated by the sliding window, which can eliminate the noise interference caused by short-time start-stop and load fluctuation, so that the pump energy consumption term reflects the continuous energy efficiency level. The larger the pump energy consumption term is, the more unoptimized the current flow distribution is and the lower the energy efficiency is, prompting the need to adjust the pump speed and the cooling loop. Based on the sliding time window, the key position temperature rate is calculated using the difference method, and the average value of the key position temperature rate in the window is obtained as the temperature rise rate reference value, and the temperature rise rate term is obtained by dividing the absolute value of the current key position temperature rate by the temperature rise rate reference value. Among them, the temperature rise rate is a physical quantity that measures the speed of change of the key position temperature, which is usually calculated by dividing the difference between adjacent sampling temperatures by the time interval; the temperature rise rate reference value takes the mean value of the rate in the sliding window, which reflects the smooth change of the temperature under normal conditions; the temperature rise rate term reflects whether the instantaneous temperature rise and fall is abnormal, and the larger the temperature rise rate term is, the more likely the temperature control trend will mutate and overshoot.

[0056] In the embodiment, by real-time collection and sliding window statistics of the key position temperature and variable frequency pump power core operation data of the primary side and the secondary side of the liquid cooling system, the temperature control deviation term, the pump energy consumption term and the temperature rise rate term are used for multi-index dynamic analysis, which effectively realizes the continuous monitoring of the temperature control effect and the energy efficiency level and the sensitive identification of abnormal trends. It can timely find the problems of cooling loop temperature control failure, pump control energy consumption abnormality and temperature mutation, improve the temperature stability and the intelligent level of the overall operation of the liquid cooling charging under complex working conditions, and ensure the consistency and reliability of the data evaluation and control decision process.

[0057] Specifically, in combination with the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, the specific process of dynamically quantifying the comprehensive performance of each group of flow distribution is as follows: obtaining a plate heat exchanger thermal resistance judgment value and a heat storage response capacity value; comparing the plate heat exchanger thermal resistance judgment value with a thermal resistance threshold value, if the plate heat exchanger thermal resistance judgment value is greater than the thermal resistance threshold value, a positive difference is taken, otherwise, zero is taken, to obtain a plate heat exchanger thermal resistance constraint term, which reflects that if the plate heat exchanger has an abnormal state, the penalty value will increase with the degree of over-limit, and if the plate heat exchanger thermal resistance judgment value is lower than the thermal resistance threshold value, the plate heat exchanger thermal resistance constraint term is zero; comparing the heat storage response capacity value with a heat storage threshold value, if the heat storage response capacity value is less than the heat storage threshold value, a positive difference is taken, otherwise, zero is taken, to obtain a heat storage capacity constraint term, which is used to measure whether the PCM heat storage margin is sufficient, if not, the heat storage capacity constraint term is greater than zero, prompting the optimization algorithm to preferentially avoid low-margin conditions; adding the temperature control deviation term, the pump energy consumption term, the temperature rise rate term, the plate heat exchanger thermal resistance constraint term and the heat storage capacity constraint term to obtain a flow distribution comprehensive evaluation value, which is input as a target function of flow distribution optimization, can balance the multiple targets of temperature control safety, heat exchange health, energy consumption and response dynamics, and guide to select the flow distribution combination with the best comprehensive performance at each flow scheduling, so as to realize adaptive, data-driven and intelligent collaborative control in the whole process.

[0058] wherein the specific formula of the flow distribution comprehensive evaluation value is:

[0059] ;

[0060] in the formula, represents the flow distribution comprehensive evaluation value, through comprehensive analysis of multiple indexes of key temperature control accuracy, pump energy consumption, temperature change rate, plate heat exchanger thermal resistance and heat storage response capacity, the safety, energy efficiency and response speed of operation are unified in the same optimization framework, and then the optimal flow distribution is obtained; represents the current key position temperature, for the primary side internal circulation loop and the secondary side external circulation loop, it is the primary side liquid cooling outlet temperature and the secondary side liquid cooling outlet temperature respectively; represents the target temperature control reference value, represents the key position temperature variance; represents the temperature control deviation term, which measures the deviation degree of the actual temperature from the target temperature, and ensures that the core components are always in the safe temperature control interval; represents the current primary side variable frequency pump power; represents the current secondary side variable frequency pump power; represents the pump energy consumption reference value; represents the pump energy consumption term, which realizes real-time constraint and optimization of the energy consumption of the cooling pump, and realizes high-efficiency and energy-saving operation; represents the current key position temperature rate; represents the temperature rise rate reference value; represents the temperature rise rate term, reflecting the potential thermal runaway risk caused by too fast temperature change, ensuring smooth heat management; represents the plate heat exchanger thermal resistance judgment value; represents the thermal resistance threshold value; represents the plate heat exchanger thermal resistance constraint term, triggering the penalty term when the plate heat exchanger thermal resistance exceeds the standard, reflecting the risk of heat exchanger blockage and decay in a timely manner; represents the heat storage response capacity value; represents the heat storage threshold value; represents the heat storage capacity constraint term, triggering the risk prompt when the phase change material heat storage capacity is insufficient, and warning of heat storage failure in advance.

[0061] In this embodiment, by integrating the plate heat exchanger thermal resistance judgment value and the phase change material heat storage response capacity value, the plate heat exchanger thermal resistance constraint term and the heat storage capacity constraint term are dynamically introduced, and the multi-dimensional real-time evaluation indexes of temperature control deviation, pump energy consumption and temperature rise rate are combined to form an integrated flow distribution comprehensive evaluation function as the core target of flow scheduling and optimization. It can guarantee temperature control safety, improve heat exchange efficiency, reduce energy consumption and suppress temperature fluctuation, while avoiding abnormal plate and insufficient heat storage risk conditions, realizing adaptive decision and intelligent collaborative control based on working condition data in the whole charging process.

[0062] Specifically, the specific process of selecting a flow distribution scheme according to comprehensive performance and adjusting pump speed, and performing liquid cooling global collaborative optimization is as follows: for the primary side inner circulation loop and the secondary side outer circulation loop, the primary side liquid cooling outlet temperature and the secondary side liquid cooling outlet temperature are respectively taken as the key part temperature, and the respective flow distribution comprehensive evaluation value is calculated in real time; based on a sliding time window, all historical liquid cooling flow combinations are traversed, and the liquid cooling flow combination with the minimum flow distribution comprehensive evaluation value is selected as the liquid cooling flow set value of the primary side inner circulation loop and the secondary side outer circulation loop, and is respectively taken as the real-time adjustment target of the primary side variable frequency pump speed and the secondary side variable frequency pump speed, and the corresponding pump speed control instruction is output, and the double circulation flow is distributed; the sliding window method is used for dynamically counting and filtering historical flow combinations and effects, so that the selected flow set scheme can fully reflect the current mainstream working condition trend, and has good robustness and self-adaptive ability. The pump speed control instruction is transmitted in real time through the industrial Ethernet with the variable frequency drive module, to realize the integrated closed-loop control of software and hardware. If the duration of the flow distribution comprehensive evaluation value being greater than the safety threshold value exceeds the maximum allowable threshold value, a risk warning is issued, and temporary load reduction, flow limiting and step charging strategies are executed in linkage; the temporary load reduction and flow limiting are used to automatically reduce the maximum allowed power of the charging pile and the gun line according to the actual thermal management capability; the step charging strategy is used for intelligent scheduling of the task queue, and low-load devices are preferentially arranged to smooth the thermal shock of the whole system. All historical flow distribution comprehensive evaluation values and corresponding pump speed adjustment targets are written into the liquid cooling charging working condition database, and a sliding window adaptive statistical and abnormal detection algorithm is used in combination with a ridge regression algorithm to continuously correct the target temperature control reference value, the pump energy consumption benchmark value, the temperature rise rate benchmark value, the thermal resistance threshold value and the heat accumulation threshold value. The sliding window adaptive statistical method can automatically track the change trend of the working condition, timely exclude the influence of occasional abnormal values on the parameters, and improve the threshold adaptability and reliability. The ridge regression algorithm is a machine learning regression model, which can improve the stability of parameter estimation when the multivariate correlation is strong and the noise is large, continuously optimize the setting of multiple parameters and threshold values, and ensure the overall adaptability and global consistency.

[0063] In the embodiment, by means of the sliding window statistics and machine learning algorithm, the temperature and flow data of the primary side and the secondary side circulation are dynamically monitored and globally traversed, the flow combination with the optimal flow distribution comprehensive evaluation value is selected in real time as the pump speed adjustment target, the adaptive closed-loop control and efficient thermal management of the double-loop liquid cooling are realized. The flow and pump speed distribution can be adjusted in time according to the thermal load fluctuation and real-time working condition, abnormality can be warned, load reduction, flow limiting and step charging can be executed in linkage, and the high thermal shock risk can be effectively inhibited. Through the archiving of historical data, abnormal detection and continuous correction of each key parameter and threshold value by the ridge regression, the parameter adaptability and operation and maintenance intelligence level are improved, the data consistency and accuracy of the control decision are ensured, and the safety, flexibility and full-process intelligent capability are enhanced.

[0064] Referring toFigure 2 As shown, the second aspect of the present application provides an intelligent liquid cooling charging system based on plate heat exchanger isolation and phase change heat storage, which is applied to the intelligent liquid cooling charging method based on plate heat exchanger isolation and phase change heat storage, and includes: a liquid cooling charging data acquisition and preprocessing module, which is used for real-time acquisition of liquid cooling full loop working condition data, data preprocessing of the liquid cooling full loop working condition data, and real-time storage; a plate heat exchanger isolation and thermal resistance discrimination module, which is used for real-time judgment of the health state of the plate heat exchanger based on the preprocessed liquid cooling full loop working condition data, adjustment of the liquid cooling parameters according to the health state of the plate heat exchanger, guarantee of the heat exchange efficiency and charging safety; a phase change heat storage unit and heat storage response module, which is used for real-time evaluation of the heat storage capacity of the phase change material heat storage unit based on the preprocessed liquid cooling full loop working condition data, and adoption of high-load charging safety and thermal management stable maintenance measures according to the heat storage capacity of the phase change material heat storage unit; and a flow distribution and pump control energy consumption optimization module, which is used for comprehensive analysis of the liquid cooling full loop working condition data, dynamic evaluation of the temperature control and energy consumption state, dynamic quantification of the comprehensive performance of each group of flow distribution in combination with the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, selection of a flow distribution scheme and adjustment of the pump speed according to the comprehensive performance, and liquid cooling global collaborative optimization.

[0065] In the embodiment, through integration of the liquid cooling charging data acquisition and preprocessing, plate heat exchanger isolation and thermal resistance discrimination, phase change heat storage unit and heat storage response, and flow distribution and pump control energy consumption optimization multi-level modules, real-time perception, standardized processing and full-process intelligent management and control of the liquid cooling charging system full loop working condition data are realized. The health state of the plate heat exchanger can be dynamically discriminated, the cooling parameters can be self-adaptively adjusted, the heat storage capacity of the phase change material heat storage unit can be accurately evaluated, and the optimal flow distribution scheme and pump speed setting can be intelligently selected accordingly, so as to improve the heat exchange efficiency and thermal management safety. Through multi-index comprehensive evaluation and global optimization, the temperature control stability, energy efficiency level and fault response capability of the charging process are significantly enhanced, and the safety, intelligence and operation reliability of the liquid cooling charging are overall improved.

[0066] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0067] The preferred embodiments of the application disclosed above are only to facilitate the understanding of the application. The preferred embodiments do not describe all the details necessary for the practice of the application and are not intended to limit the application to the particular embodiments described. As will be obvious to one of skill in the art, modifications and changes can be made without departing from the spirit and scope of the present application. The present description is chosen and described in order to best explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent liquid cooling charging method based on plate exchange isolation and phase change heat storage, characterized in that, The method comprises the following steps: S1, collecting liquid cooling full loop working condition data in real time, pre-processing the liquid cooling full loop working condition data, and storing the liquid cooling full loop working condition data in real time; S2, judging the health state of the plate heat exchanger in real time based on the pre-processed liquid cooling full loop working condition data, adjusting the liquid cooling parameters according to the health state of the plate heat exchanger, and guaranteeing the heat exchange efficiency and charging safety; S3, evaluating the heat storage capacity of the phase change material heat storage unit in real time based on the pre-processed liquid cooling full loop working condition data, and taking high-load charging safety and thermal management stable maintenance measures according to the heat storage capacity of the phase change material heat storage unit; The specific process of evaluating the heat storage capacity of the phase change material heat storage unit in real time based on the pre-processed liquid cooling full loop working condition data is as follows: In the primary side internal circulation loop, the phase change material heat storage unit is arranged in series, which is used for dynamically absorbing and buffering the waste heat of the charging pile core components during the charging process, the plate exchanger outlet temperature, the PCM unit temperature and the fixed effective thickness of the PCM material are obtained in real time, the difference between the plate exchanger outlet temperature and the PCM unit temperature is divided by the fixed effective thickness of the PCM material, and then multiplied by the heat exchange weight factor to obtain the heat exchange index factor, the reciprocal of the heat exchange index factor is taken as the exponential power to obtain the nonlinear heat absorption reduction value, and the constant one is subtracted from the nonlinear heat absorption reduction value to obtain the heat absorption response term; The fixed mass of the PCM material, the latent heat of the PCM material and the primary side heat power are obtained in real time, based on the sliding time window, the primary side heat power in the sliding window of the current period is counted and the maximum value is selected to obtain the period heat flow peak value, the product of the fixed mass of the PCM material, the latent heat of the PCM material and the heat absorption response term is divided by the product of the period heat flow peak value and the sliding time window length to obtain the heat storage response capacity value; S4, comprehensively analyzing the liquid cooling full loop working condition data, dynamically evaluating the temperature control and energy consumption state, and dynamically quantifying the comprehensive performance of each group of flow distribution according to the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, selecting a flow distribution scheme according to the comprehensive performance and adjusting the pump speed, and performing liquid cooling global collaborative optimization.

2. The intelligent liquid cooling charging method based on plate change isolation and phase change heat storage according to claim 1, characterized in that, The specific process of collecting the liquid cooling full loop working condition data in real time, pre-processing the liquid cooling full loop working condition data, and storing the liquid cooling full loop working condition data in real time is as follows: During the liquid cooling charging operation, the liquid cooling full loop working condition data is collected in real time by the multiple types of high-precision sensors deployed at the key nodes in the double-loop structure physically isolated by the primary side internal circulation and the secondary side external circulation, the liquid cooling full loop working condition data includes: charging power, primary side liquid cooling inlet temperature, primary side liquid cooling outlet temperature, secondary side liquid cooling inlet temperature, secondary side liquid cooling outlet temperature, plate exchanger inlet temperature, plate exchanger outlet temperature, PCM unit temperature, primary side liquid cooling flow, secondary side liquid cooling flow, primary side variable frequency pump power and secondary side variable frequency pump power, the specific heat capacity of the primary side cooling liquid, the specific heat capacity of the secondary side cooling liquid, the latent heat of the PCM material, the fixed mass of the PCM material and the fixed effective thickness of the PCM material are synchronously called from the material parameter library; The collected liquid cooling full loop working condition data are time-synchronized by unified time stamp alignment, and noise filtering and abnormal correction are performed by using outlier rejection and sliding window smoothing algorithm; for missing and abnormal sampling points, interpolation and data completion algorithm is used to restore continuity; and the liquid cooling full loop working condition data are subjected to data non-dimensional normalization and unit standardization processing; a liquid cooling charging working condition database is established, and the liquid cooling full loop working condition data with time stamp are stored in the liquid cooling charging working condition database.

3. The intelligent liquid-cooled charging method based on plate change isolation and phase change heat storage according to claim 1, characterized in that, The specific process of judging the health state of the plate heat exchanger in real time based on the preprocessed liquid cooling full loop working condition data is as follows: An efficient plate heat exchanger is arranged between the primary side inner circulation loop and the secondary side outer circulation loop to realize physical isolation of the cooling liquid and efficient energy exchange; the primary side liquid cooling inlet temperature, the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the specific heat capacity of the primary side cooling liquid are obtained in real time; the difference between the primary side liquid cooling inlet temperature and the primary side liquid cooling outlet temperature, the primary side liquid cooling flow and the specific heat capacity of the primary side cooling liquid are multiplied to obtain the primary side heat power, and the primary side heat power is taken as the total heat exchange amount of the plate heat exchanger; The secondary side liquid cooling inlet temperature, the secondary side liquid cooling outlet temperature, the secondary side liquid cooling flow and the specific heat capacity of the secondary side cooling liquid are obtained; the difference between the secondary side liquid cooling outlet temperature and the secondary side liquid cooling inlet temperature, the secondary side liquid cooling flow and the specific heat capacity of the secondary side cooling liquid are multiplied to obtain the secondary side heat power; the absolute difference between the primary side heat power and the secondary side heat power is divided by the total heat exchange amount of the plate heat exchanger, and multiplied by the energy mismatch weight factor to obtain the energy mismatch correction value; The difference between the primary side liquid cooling inlet temperature and the secondary side liquid cooling outlet temperature is divided by the total heat exchange amount of the plate heat exchanger to obtain the apparent thermal resistance value; The apparent thermal resistance value and the energy mismatch correction value are standardized to make the dimension and numerical level close, and the apparent thermal resistance value and the energy mismatch correction value are added to obtain the plate heat exchanger thermal resistance judgment value.

4. The intelligent liquid-cooled charging method based on plate change isolation and phase change heat storage according to claim 1, characterized in that, The specific process of adjusting the liquid cooling parameters according to the health state of the plate heat exchanger to ensure the heat exchange efficiency and charging safety is as follows: The plate heat exchanger thermal resistance judgment value is written into the liquid cooling charging working condition database in real time, and compared with the thermal resistance threshold value; when the plate heat exchanger thermal resistance judgment value is less than or equal to the thermal resistance threshold value, it is determined that the plate heat exchanger is in a healthy and efficient working condition, and the conventional liquid cooling operation is maintained without additional adjustment; When the plate heat exchanger thermal resistance judgment value is greater than the thermal resistance threshold value, the positive and negative of the energy mismatch correction value is judged to identify whether the energy mismatch exists in the primary side inner circulation loop or the secondary side outer circulation loop; the liquid cooling flow and the variable frequency pump speed distribution of each loop are adjusted according to the energy mismatch source, and a plate heat exchanger cleaning and maintenance prompt is issued; if the plate heat exchanger thermal resistance judgment value is still greater than the thermal resistance threshold value within the maximum allowable threshold value, the charging pile and the charging gun line are temporarily reduced in load and flow.

5. The intelligent liquid-cooled charging method based on plate change isolation and phase change heat storage according to claim 1, characterized in that, The specific process of taking high-load charging safety and thermal management stable maintenance measures according to the heat storage capacity of the phase change material heat storage unit is as follows: The heat storage response capability value is written into a liquid cooling charging condition database in real time, and is compared with a heat storage threshold value, when the heat storage response capability value is greater than or equal to the heat storage threshold value, it is determined that the phase change material heat storage is sufficient, the current heat buffer working mode mainly using the PCM heat storage unit is maintained, the PCM heat storage unit is continuously used preferentially to carry out waste heat peak shaving and heat adjustment, and cooling path switching and maintenance intervention are not needed; When the heat storage response capability value is less than the heat storage threshold value, it is determined that the phase change material heat storage is insufficient, the cooling path mainly using an external radiator and a fan is switched to; a prompt for replacing and supplementing the phase change material module is triggered; and during the phase change material heat storage being insufficient, a charging process with a charging power greater than a heat load threshold value is implemented to delay a task, and devices with a charging power less than or equal to the heat load threshold value are preferentially arranged to charge.

6. The intelligent liquid-cooled charging method based on plate change isolation and phase change heat accumulation according to claim 1, characterized in that, The specific process of the comprehensive analysis of the liquid cooling full loop working condition data and the dynamic evaluation of the temperature control and energy consumption state is as follows: The primary side liquid cooling outlet temperature and the secondary side liquid cooling outlet temperature are recorded as the key position temperatures of the primary side internal circulation loop and the secondary side external circulation loop respectively; the key position temperature is obtained, the key position temperature mean value, the key position temperature standard deviation and the key position temperature variance are calculated in real time based on a sliding time window, the key position temperature mean value plus the key position temperature standard deviation is taken as a target temperature control reference value, the square of the difference between the current key position temperature and the target temperature control reference value is calculated, and the temperature control deviation term is obtained by dividing the key position temperature variance; The primary side variable frequency pump power and the secondary side variable frequency pump power are obtained, the primary side variable frequency pump power and the secondary side variable frequency pump power are added to obtain the total variable frequency pump power, the total variable frequency pump power mean value is calculated as a pump energy consumption reference value based on the sliding time window, and the pump energy consumption term is obtained by dividing the current total variable frequency pump power by the pump energy consumption reference value; The key position temperature rate is calculated based on the sliding time window by using the difference method, and the average value of the key position temperature rate in the window is obtained to obtain the temperature rise rate reference value, and the temperature rise rate term is obtained by dividing the current key position temperature rate absolute value by the temperature rise rate reference value.

7. The intelligent liquid-cooled charging method based on plate change isolation and phase change heat accumulation according to claim 1, characterized in that, The specific process of dynamically quantifying the comprehensive performance of each group of flow distribution by combining the health state of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit is as follows: The plate heat exchanger thermal resistance judgment value and the heat storage response capability value are obtained; the plate heat exchanger thermal resistance judgment value is compared with the thermal resistance threshold value, if the plate heat exchanger thermal resistance judgment value is greater than the thermal resistance threshold value, a positive difference is taken, otherwise, zero is taken, and the plate heat exchanger thermal resistance constraint term is obtained; The heat storage response capability value is compared with the heat storage threshold value, if the heat storage response capability value is less than the heat storage threshold value, a positive difference is taken, otherwise, zero is taken, and the heat storage capacity constraint term is obtained; The flow distribution comprehensive evaluation value is obtained by adding the temperature control deviation term, the pump energy consumption term, the temperature rise rate term, the plate heat exchanger thermal resistance constraint term and the heat storage capacity constraint term.

8. The intelligent liquid-cooled charging method based on plate change isolation and phase change heat accumulation according to claim 1, characterized in that, The specific process of selecting a flow distribution scheme and adjusting the pump speed according to the comprehensive performance, and performing liquid cooling global collaborative optimization is as follows: For the primary side internal circulation loop and the secondary side external circulation loop, the primary side liquid cooling outlet temperature and the secondary side liquid cooling outlet temperature are taken as the key position temperatures respectively, and the flow distribution comprehensive evaluation values of the two are calculated in real time respectively; Based on the sliding time window, all historical liquid cooling flow combinations are traversed, and the liquid cooling flow combination with the minimum flow distribution comprehensive evaluation value is selected as the current primary side internal circulation loop and secondary side external circulation loop liquid cooling flow set value, and is respectively taken as the real-time adjustment target of the primary side variable frequency pump speed and the secondary side variable frequency pump speed, and the corresponding pump speed control instruction is output, and the double circulation flow distribution is performed; If the duration of monitoring the flow distribution comprehensive evaluation value greater than the safety threshold value exceeds the maximum allowable threshold value, a risk warning is issued, and temporary load reduction, flow limiting and step charging strategies are executed in linkage; All historical flow distribution comprehensive evaluation values and corresponding pump speed adjustment targets are written into the liquid cooling charging condition database, a sliding window adaptive statistical and anomaly detection algorithm is adopted, and in combination with a ridge regression algorithm, the target temperature control reference value, pump energy consumption benchmark value, temperature rise rate benchmark value, thermal resistance threshold value and heat storage threshold value are continuously corrected.

9. An intelligent liquid-cooled charging system based on plate heat exchanger insulation and phase change heat storage, applying the intelligent liquid-cooled charging method based on plate heat exchanger insulation and phase change heat storage according to any one of claims 1-8, characterized in that, It includes: A liquid cooling charging data acquisition and preprocessing module for real-time acquisition of liquid cooling full loop working condition data, data preprocessing of liquid cooling full loop working condition data and real-time storage; A plate heat exchanger isolation and thermal resistance discrimination module for real-time judgment of the health status of the plate heat exchanger based on the preprocessed liquid cooling full loop working condition data, adjustment of the liquid cooling parameters according to the health status of the plate heat exchanger, and guarantee of the heat exchange efficiency and charging safety; A phase change heat storage unit and heat storage response module for real-time evaluation of the heat storage capacity of the phase change material heat storage unit based on the preprocessed liquid cooling full loop working condition data, and taking high-load charging safety and thermal management stable maintenance measures according to the heat storage capacity of the phase change material heat storage unit; A flow distribution and pump control energy consumption optimization module for comprehensive analysis of the liquid cooling full loop working condition data, dynamic evaluation of the temperature control and energy consumption state, and dynamic quantification of the comprehensive performance of each flow distribution scheme in combination with the health status of the plate heat exchanger and the heat storage capacity of the phase change material heat storage unit, and adjustment of the pump speed according to the comprehensive performance, and liquid cooling global collaborative optimization.

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